Red Zeppelin

Family: Amaryllidaceae Bulb Onion

Aromatically pungent at first touch, Red Zeppelin forms handsome, deep garnet-red bulbs that hold their color with a confident, glossy sheen.

The flesh is crisp and well-layered, offering a balanced bite that sweetens beautifully when cooked down and shines in fresh preparations. Ideal for intermediate-day gardeners seeking reliable bulbing and long-lasting storage, Red Zeppelin is a standout for hearty sauces, roasting, and pickling-style preserves.

Light: Full SunMaturity: 110 DaysHabit: Bulbing

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 14th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 18th
Harvest Begins	Aug 6th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	110
Sun Requirements	Full Sun
Growth Habit	Bulbing
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	50
Min Night Temp (°F)	35
Harden Off (days)	7

Culinary Notes

Chef's Note

Red Zeppelin brings that classic allium kick that mellows into a syrupy, garnet-sweet finish, with layers that don’t turn to mush as quickly as some onions. Use it when you want visible color and a confident bite—then let time and heat do the sweet work.

Best Uses

caramelized base for braises and long-simmer sauces
roasting whole or in thick wedges for jammy edges
quick-pickling-style preserves where a clean snap matters
fresh preparations where the crisp layers can be eaten through

Flavor Profile

sharp, aromatic pungency on first cut crisp, layered crunch with a sweet-cook transformation balanced bite—red-bulb color stays vivid

Kitchen Pairings

balsamic vinegar beef or lamb thyme gruyère smoked paprika mustard

Frequently Asked Questions

What pest or disease is most likely on Allium cepa (red onion) and how can I prevent it?

Watch for onion thrips and downy mildew, which are common on Allium cepa. Use preventive sprays only if needed: remove any infected leaves early (yellowing tips or fuzzy gray/whitish growth), keep foliage dry by watering at the soil line, and rotate onion family crops so they’re not grown in the same bed for at least 3 years. If you see thrips, use insecticidal soap and target the undersides of leaves, repeating as new growth appears.

How often should I water Allium cepa during the main growing phase?

During active leaf growth and bulb sizing, keep the soil evenly moist but not waterlogged—about 1 inch of water per week, split into 2–3 waterings if it’s hot or windy. Check moisture: the top 1–2 inches should be moist, but the bed should drain well. Stop frequent watering once most tops start to yellow and fall over so the bulbs can dry and cure.

How do I tell when red onions (Allium cepa, Red Zeppelin type) are ready to harvest?

Harvest when about half of the tops have flopped over and the necks are thinning, with dry, papery skins covering the bulb. Gently lift one or two plants to confirm bulb size matches your expected mature diameter and that skins are fully colored. Choose a dry day, then cure bulbs in a warm, airy place out of direct sun for about 2–3 weeks before storage.